Managed Investment Entities (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended				1 Months Ended		9 Months Ended
	Sep. 30, 2014 collateralizedloanobligation	Dec. 31, 2013	Sep. 30, 2014 Variable interest entity, primary beneficiary [Member]	Dec. 31, 2013 Variable interest entity, primary beneficiary [Member]	Jul. 31, 2014 New collateralized loan obligation entities [Member]	Sep. 30, 2014 Subordinated debt obligations [Member] Variable interest entity, primary beneficiary [Member]	Sep. 30, 2014 Senior debt obligations [Member]
Variable Interest Entity [Line Items]
Percentage of investment of most subordinate debt tranche, Minimum	7.50%
Percentage of investment of most subordinate debt tranche, Maximum	51.20%
Number of collateralized loan obligation entities	12
Aggregate fair value of investment in collateralized loan obligations			$ 318	$ 271		$ 120
Face value of liabilities issued by managed investment entities on issuance date					410
Face amount of managed investment entities liabilities purchased by subsidiaries at issuance date					68
Face amount of managed investment entities liabilities purchased by subsidiaries after issuance date							8
Amount paid by subsidiaries to purchase managed investment entities liabilities after issuance date							8
Proceeds received by subsidiaries related to redemptions of managed investment entities liabilities	57
Difference between aggregate unpaid principal balance and fair value of CLOs' fixed maturity investments	42	15
Difference between aggregate unpaid principal balance and fair value of CLOs' debt	112	109
Carrying amount of CLO loans in default	2	1
Aggregate unpaid principal balance of CLO loans in default	$ 6	$ 6